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Gentoo Linux Security Advisory                           GLSA 200612-09
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                                            http://security.gentoo.org/
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  Severity: High
     Title: MadWifi: Kernel driver buffer overflow
      Date: December 10, 2006
      Bugs: #157449
        ID: 200612-09

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Synopsis
========

MadWifi is vulnerable to a buffer overflow that could potentially lead
to the remote execution of arbitrary code with root privileges.

Background
==========

MadWifi (Multiband Atheros Driver for Wireless Fidelity) provides a
Linux kernel device driver for Atheros-based Wireless LAN devices.

Affected packages
=================

    -------------------------------------------------------------------
     Package                  /  Vulnerable  /              Unaffected
    -------------------------------------------------------------------
  1  net-wireless/madwifi-ng      < 0.9.2.1                 >= 0.9.2.1

Description
===========

Laurent Butti, Jerome Raznieski and Julien Tinnes reported a buffer
overflow in the encode_ie() and the giwscan_cb() functions from
ieee80211_wireless.c.

Impact
======

A remote attacker could send specially crafted wireless WPA packets
containing malicious RSN Information Headers (IE) that could
potentially lead to the remote execution of arbitrary code as the root
user.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All MadWifi users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-wireless/madwifi-ng-0.9.2.1"

References
==========

  [ 1 ] CVE-2006-6332
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6332

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200612-09.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2006 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5